Normal this simple zul file causes an error in ZK
<zk>
<label value="𣡷" />
</zk>
the character was taken from here http://www.fileformat.info/info/charset/UTF-16/list.htm?start=65536
ERROR:
org.zkoss.idom.DOMException: Invalid character(s): '?' (0xd84e) is not a valid XML character
at org.zkoss.idom.Verifier.checkCharacterData(Verifier.java:64)
at org.zkoss.idom.Attribute.setValue(Attribute.java:110)
at org.zkoss.idom.Attribute.<init>(Attribute.java:70)
at org.zkoss.idom.Attribute.<init>(Attribute.java:76)
at org.zkoss.idom.input.DefaultIDOMFactory.newAttribute(DefaultIDOMFactory.java:33)
at org.zkoss.idom.input.SAXHandler.startElement(SAXHandler.java:509)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:501)
the unicode representation in Java has changed in Java 5 from unicode to UTF-16 or similar I assume the particular code has not been updated accordingly.
http://en.wikipedia.org/wiki/UTF-16#Use_in_major_operating_systems_and_environments
Paragraph starting with:
"Java originally used UCS-2, and added UTF-16 supplementary character support in J2SE 5.0."